Traveling belt stoker



July 26, 1938. H. L. WHITE I TRAVELJENG BELT STOKER Filed Dec.

v !NVENTO!2 bQzr-rwonl mtg BY QTFW Patented July 26, 1938 UNITED STATESPATENT OFFICE 2 Claims.

The object of this invention is to provide a new and improved form of anendless traveling grate for a furnace which grate will also act as amechanical stoker.

Another object of the invention is to provide a belt having grate bars,which travel up a steep incline at the forward end where the coal isreceived and by which the coal is turned over and over, and is caused toroll back on the belt.

These and other objects of the invention will be illustrated in thedrawing described in the specification and pointed out in the claims atthe end thereof.

In the drawing, Fig. 1 is a side elevation of the grate, the belt andsome of the parts associated therewith being shown in vertical section.

Fig. 2 is a vertical section on the line 2a:2a: of Fig. 1.

Fig 3 is a top plan view of two links of one of the chains.

Fig. 4 is a vertical section through the links, the section being takenon the line dos-4x of i 3.

In the drawing like reference numerals indicate like parts.

In the drawing reference numerals I, l indicate small sprocket wheels atthe lower end of the belt, and 2, 2 indicate large sprocket wheels atthe upper end of the belt. The sprocket wheels are mounted to rotatewith shafts 3 and 4 respectively. Over these sprocket wheels travelchains 5 and 6 on which chains are fastened cross bars I, 1 by whichcross bars the two chains are connected together. These cross bars arenarrower than the links to which they are attached so that an intervalis provided between them through which the ashes can fall. These crossbars are beveled, that is they are thin on the front and thick at theback. This prevents the coal from lodging in the cracks between the barsand helps the coal to roll over backwards. The shaft 3 is extended atthe left as shown in Figure 2 so that the chains and belt may be drivenin the direction indicated by the arrow by power.

At the upper end is provided the hopper 8 from which the coal is fed bya feed regulating device 9. The coal is fed on to a chute ID from whichit is delivered to the belt preferably at the upper end.

The lower run of the belt is supported by rollers II, II, five of whichare shown in Fig. 1, on which rollers the cross bars I bear, and bywhich rollers they are held in practically a straight line. The chainsare given a surplus length so that the upper run of the belt will sagand the top of the sprocket wheel 2 is placed at a considerableelevation above: the top of the sprocket wheel I so that the belt as itapproaches the sprocket wheels 2 will travel up a steep incline.

The belt is enclosed in a fire box l2, which holds the coal from rollingoff the side of the belt. The tendency of the travel and the slope ofthe belt is to accumulate the fire at the upper end of the fire potwhere it is turned over and over and the burning coal is mixed with thefresh coal so that the apparatus acts more or less as a smoke consumer.The chain travels at from 2 to 4 feet per minute. While the fire is orcan be maintained the whole length of the fire pot, the bottom of thefire is continually drawn up and turned over on top of the fire.

The links of the belt are each provided with a broad hook l5 at one endand a broad slot H5 at the other end with which the hook of the nextproceeding link engages. A recess I1 is provided in the link at one sideof the slot, which permits the hook 15 of the next succeeding link toslide sideways therein and to make full engagement therewith ordisengage therefrom.

I claim:

1. A combination of a belt comprising: two

chains having links therein, crossbars connecting the links of the twochains, said belt being adapted to travel through the firebox of afurnace, the under run of said belt being supported so that it travelssubstantially in a straight line, the upper run of said belt beingallowed to sag, the upper part of said belt traveling up in a steepincline, means for feeding coal on the steep inclined part of the belt,the upward movement of the belt being adapted to carry the coal up thesteep incline and permitting it to roll back down the incline.

2. The combination of a belt comprising two chains having links therein,cross bars connecting the links of the two chains, said belt beingadapted to travel through the firebox of a furnace, the upper run ofsaid belt being allowed to sag in the middle thereof, the upper part ofsaid belt traveling up in a steep incline, means for feeding coal on thesteep inclined part of the belt, the upward movement of the belt beingadapted to carry the coal up the steep incline and permitting it to rollback down the incline.

HARRISON L. WHITE.

